Lock.



'PATENTED APR. 14, 1908.

J. PHILLIPS.

LOCK.

APPLICATION FILED JULY 1, 1907.

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UNITED STATES PATENT oEEroE.

JOSEPH PHILLIPS, OF MIDLAND, ONTARIO, CANADA.

LOOK.

To all whom it may concern:

Be it known that I, JOSEPH PHILLIPS, a sub ect of the King of Great Britain and Ireland, and a resident of Midland, in the county of Simcoe, Province of Ontario, and Dominion of Canada, gunsmith, have invented a new and Improved Lock, of which the following is a specification.

My invention relates to looks for doors, and the objects of my improvements are, to provide a lock that may be operated by either a thumb latch or by a knob latch, or be arranged to be operated by both or either at will; to provide a lock, the bolt of which shall be slidable by one key while the admission of the key be determined by one or a plurality of keys and to provide a lock of this type with interior shields which shall prevent the entrance-of all instruments such as skeleton keys and lock picks. I attain these objects by the construction illustrated in the accompanying drawings, in which Figure 1 is a view of the interior of the look With the face plate removed. Fig. 2 is a cross section on an enlarged scale taken on the line AA of Fig. 1. Fig. 3 is a side view of the lock. Fig. 4 is an end view of the same.

Similar reference characters refer to like parts throughout the several views.

The lock shown is composed of the case 3, to which the cover 4 is attached by means of the screws 5. Then it is desired to use the look as a side lock for either right or left hand doors, screws may be inserted through the holes 6. When the lock is to be used as a mortise lock, the face plate 7 is attached, which has two lips 8 that fit the top and bottom of the lock and are secured thereto by screws 9. Holes 10 provide for screws that are to hold the face plate to the edge of the door.

The latch portion of the lock will be described first, being distinct in its operation from the locking part.

The knobs 12 are provided with recesses into which the lugs 13 on the ends of the hubs 14 engage. Into these hubs a tube 15, having a slot, engages, and on the tube are mounted the cam 16, the spacing rings 17, and through it passes the bolt 13 which engages the nut 19 at the outer face of one of the knobs. This construction is very strong, there being no small screws to be lost and all the stress coming on the strong tube 15. The knobs may be of any desired Specification of Letters Patent.

Application filed July 1, 1907. Serial No. 381,726.

Patented April 14, 1908.

material, and the space between the hubs may be regulated by the number, and length of the rings 17.

The cam 16 is shown in Fig. 1, from which it will be seen that it will slide back the latch 20 when turned in either direction. The end 21 of the latch is beveled in the usual manner, and its body is in the form of a flat plate having a slot 22 for the hub 23 of the cam, and its inner end has a raised portion 24 which engages the cam 16. As this raised portion is on one side only, the latch can be turned over so that it will be adapted for either right or left hand doors.

The widened portion 24 of the latch is provided with recesses 25 at its upper and lower edges into which the rounded end of the short arm 26 of the bell crank lever 27 engages, according to the way the latch is turned. The free end of this lever is weighted and normally tends to hold the latch outward, but for quickness of movement the spring 28 may be added to assist the weight. The pivot 29 of this lever is secured in the back 3.

Passing through a slot in the upper part of the lock is a lift link to the upper end of which may be attached the mechanism of a thumblatch or any desirable connection by which, especially when comprising a flexible connec tion, the latch can be withdrawn by a person at a distance. The lifter is in two arts, 30 and 31, the former provided with a slbt to receive the hook 32 on the lever 27, the other having the ring 33, the two parts being slidably connected by the pins 34 and slot 35 so that the parts may be entirely contained within the look when it is to be used as a mortise lock. The lifter is guided between airs of pins 36 projecting from the cover 4. ft will be observed that this latch mechan ism may be used independently of any looking mechanism. The drawings show the latch in connection with the locking mechanism described in my Patent No. 860,055, dated July 16, 1907.

Having now explained my improvements, what I claim as my invention and desire to secure by Letters Patent, is-

1. In a lock, the combination of a case, a latch bolt mounted therein and having an enlarged rear end provided with inclined cam faces and lateral depressions, a lever mounted in the case and having one end pivoted in one of the depressions, the other end of the lever being weighted, and tending to hold the latch 

